#include <QApplication>
#include <QAction>
#include <QMenu>
#include <QPainter>
#include <QSettings>
#include <QStyleHints>
#include <QSystemTrayIcon>
#include "autostart_manager.h"
#include "clock_widget.h"

namespace
{
// Standard macOS menu bar icon extent (points). Matches surrounding icons.
constexpr int trayIconExtent = 16;

QIcon createTrayIcon(const QColor &color)
{
    // Render at 16 logical points times the device pixel ratio so the
    // bitmap is crisp on Retina but occupies exactly one menu bar cell.
    const qreal devicePixelRatio = qApp->devicePixelRatio();
    QPixmap pixmap(qRound(trayIconExtent * devicePixelRatio),
                   qRound(trayIconExtent * devicePixelRatio));
    pixmap.setDevicePixelRatio(devicePixelRatio);
    pixmap.fill(Qt::transparent);

    QPainter painter(&pixmap);
    painter.setRenderHint(QPainter::Antialiasing);
    painter.setPen(QPen(color, 1.5));

    // Draw inside the 16pt coordinate space; center with a small margin.
    const QPointF center(trayIconExtent / 2.0, trayIconExtent / 2.0);
    const qreal radius = trayIconExtent / 2.0 - 1.5;
    painter.drawEllipse(center, radius, radius);
    painter.drawLine(QPointF(center.x(), center.y() - radius * 0.55), center);
    painter.drawLine(center, QPointF(center.x() + radius * 0.5, center.y() + radius * 0.3));

    QIcon icon;
    icon.addPixmap(pixmap, QIcon::Normal, QIcon::Off);
    return icon;
}

QColor trayIconColorForScheme(Qt::ColorScheme scheme)
{
    return scheme == Qt::ColorScheme::Dark ? QColor(Qt::white) : QColor(Qt::black);
}
}

int main(int argc, char *argv[])
{
    QApplication app(argc, argv);

    app.setApplicationName("Clouck");
    app.setOrganizationName("Clouck");
    app.setApplicationDisplayName("Clouck");

    ClockWidget clock;
    clock.show();

    // Start at Login: honor the persisted choice instead of always forcing it.
    {
        QSettings autoStartSettings("Clouck", "Clouck");
        const bool startAtLogin = autoStartSettings.value("startAtLogin", true).toBool();
        if (startAtLogin)
        {
            AutoStartManager::enableForCurrentApplication();
        }
        else
        {
            AutoStartManager::disable();
        }
        autoStartSettings.setValue("startAtLogin", startAtLogin);
    }

    const QStyleHints *styleHints = app.styleHints();
    QSystemTrayIcon trayIcon(createTrayIcon(trayIconColorForScheme(styleHints->colorScheme())), &app);
    trayIcon.setToolTip("Clouck");

    QObject::connect(styleHints, &QStyleHints::colorSchemeChanged, &trayIcon,
                     [&trayIcon](Qt::ColorScheme scheme) {
                         trayIcon.setIcon(createTrayIcon(trayIconColorForScheme(scheme)));
                     });

    QMenu trayMenu;
    QAction *toggleClockAction = trayMenu.addAction("Turn Clock Off");

    QAction *startAtLoginAction = trayMenu.addAction("Start at Login");
    {
        QSettings autoStartSettings("Clouck", "Clouck");
        startAtLoginAction->setCheckable(true);
        startAtLoginAction->setChecked(autoStartSettings.value("startAtLogin", true).toBool());
    }
    QObject::connect(startAtLoginAction, &QAction::toggled, &app, [](bool checked) {
        QSettings autoStartSettings("Clouck", "Clouck");
        autoStartSettings.setValue("startAtLogin", checked);
        if (checked)
        {
            AutoStartManager::enableForCurrentApplication();
        }
        else
        {
            AutoStartManager::disable();
        }
    });

    trayMenu.addSeparator();

    // Clock settings live directly in the tray menu — no submenu.
    const QList<QAction *> clockActions = clock.menu()->actions();
    for (QAction *action : clockActions)
    {
        trayMenu.addAction(action);
    }

    trayMenu.addSeparator();
    QAction *quitAction = trayMenu.addAction("Quit");

    const auto toggleClock = [&clock, toggleClockAction]() {
        if (clock.isVisible())
        {
            clock.hide();
            toggleClockAction->setText("Turn Clock On");
            return;
        }

        clock.show();
        clock.raise();
        toggleClockAction->setText("Turn Clock Off");
    };

    QObject::connect(toggleClockAction, &QAction::triggered, &app, toggleClock);
    QObject::connect(quitAction, &QAction::triggered, &app, &QApplication::quit);

    trayIcon.setContextMenu(&trayMenu);
    trayIcon.show();

    return app.exec();
}